Resolved: For CSS2.1 Issue 85 make backslash followed by newline invalid outside of strings by changing “except a hexadecimal digit” to “except a hexadecimal digit or a newline (\n, \r, or \f)”.

Chris to propose text for how box-shadow should work with border-image. Text should require using alpha channels of image to mask shadow and clipping inside padding box (outer shadows) or outside border box (inner shadows).